1. Acute respiratory and metabolic acidosis induced by excessive muscle contraction during spinal evoked stimulation 
Y Tohdoh, S Sumita, T Kawamata, K Omote, S Kawana, A Namiki 
British Journal of Anaesthesia 
Volume 86, Issue 4, Pages (April 2001)
DOI: /bja/
Copyright © 2001 British Journal of Anaesthesia Terms and Conditions

2. Fig 1
(a) Original trend display of arterial blood pH, PaCO2 and PaO2 recorded by continuous intra-arterial blood gas monitoring (Paratrend 7) and (b) airway pressure, end-expiratory minute volume and end-tidal carbon dioxide concentration recorded by capnography (Ultima) in case 1. Large arrows indicate direct epidural stimuli (S1 and S2). The small arrow indicates tracheal suctioning. Muscle relaxant was not given before the first stimulus (S1) but was given before the second (S2). PaCO2 increased and pH and PaO2 decreased at S1 but not at S2.
British Journal of Anaesthesia  , DOI: ( /bja/ )
Copyright © 2001 British Journal of Anaesthesia Terms and Conditions

3. Fig 2
(a) Original trend display of arterial blood gas analyses recorded by Paratrend 7 and (b) capnogram recorded by Ultima in case 2. Large arrows indicate direct epidural stimuli (S1–S4). Vecuronium was given before S1, S2 and S3, but slight paraspinal muscle contractions were observed. Only slight changes in pH, PaCO2 and end-tidal carbon dioxide concentration were observed. When SSEPs were unexpectedly applied, however, significant changes in all these parameters were observed (S4).
British Journal of Anaesthesia  , DOI: ( /bja/ )
Copyright © 2001 British Journal of Anaesthesia Terms and Conditions

4. Fig 3
(a) Trend display of arterial blood gas analyses recorded by Paratrend 7 and (b) capnogram recorded by Ultima in case 3. A slight increase in PaCO2 and decreases in pH and PaO2 were observed at S1, but not at S2.
British Journal of Anaesthesia  , DOI: ( /bja/ )
Copyright © 2001 British Journal of Anaesthesia Terms and Conditions